Techniques
Sample rules
Windows Outlook Macro Security Modified
- source: splunk
- technicques:
- T1137
- T1008
Description
The following analytic detects the modification of the Windows Registry key “Level” under Outlook Security. This allows macros to execute without warning, which could allow malicious scripts to run without notice. This detection leverages data from the Endpoint.Registry datamodel, specifically looking for the registry value name “Level” with a value of “0x00000001”. This activity is significant as it is commonly associated with some malware infections, indicating potential malicious intent to harvest email information.
Detection logic
| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Registry WHERE Registry.registry_path="*\\Outlook\\Security*" Registry.registry_value_name="Level" Registry.registry_value_data="0x00000001" by Registry.action Registry.dest Registry.process_guid Registry.process_id Registry.registry_hive Registry.registry_path Registry.registry_key_name Registry.registry_value_data Registry.registry_value_name Registry.registry_value_type Registry.status Registry.user Registry.vendor_product
| `drop_dm_object_name(Registry)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_outlook_macro_security_modified_filter`